fix(frontend): compose generate form

[axel7083]

Description

The compose generate a sneaky, hidden feature, but yet, should be working

Issues

Need rebase after #627
Fixes #586

Testing

1. Checkout PR
2. Start Podman Desktop
3. Start compose project
   3.1 podman compose -f packages/podlet-js/src/compose/tests/nginx up
4. On compose group, click on Generate Quadlet in the containers page
   
5. assert you are redirected to Quadlet webview
   
6. assert compose path is correct
7. Click on Generate
8. assert YAML content
   
9. fill the Kube filename with a valid filename
10. click on Next
11. assert the quadlet (editor) contains the filename you provided (see bellow)
    
12. select your preferred container engine
13. click on Load into machine

[gastoner]

LGTM on Linux